Rashba spin splitting in quantum wires
arXiv:cond-mat/0407036 · doi:10.1016/j.ssc.2004.05.047
Abstract
This article presents an overview of results pertaining to electronic structure, transport properties, and interaction effects in ballistic quantum wires with Rashba spin splitting. Limits of weak and strong spin--orbit coupling are distinguished, and spin properties of the electronic states elucidated. The case of strong Rashba spin splitting where the spin--precession length is comparable to the wire width turns out to be particularly interesting. Hybridization of spin--split quantum--wire subbands leads to an unusual spin structure where the direction of motion for electrons can fix their spin state. This peculiar property has important ramifications for linear transport in the quantum wire, giving rise to spin accumulation without magnetic fields or ferromagnetic contacts. A description for interacting Rashba--split quantum wires is developed, which is based on a generalization of the Tomonaga--Luttinger model.
16 pages, 7 figures, to appear in Solid State Communications
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